Improving yield strength and plasticity of high-Mn austenitic steel through texture induced twinning and HDI strengthening

IF 6.1 2区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Science and Engineering: A Pub Date : 2025-02-24 DOI:10.1016/j.msea.2025.148106

Zhi Zhao , Pengjie Wang , Xiang Ji , Jimou Zhang , Zhenyu Liu

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引用次数: 0

Abstract

In the present paper, four high-Mn austenitic steels with different heterostructures and textures are designed through asynchronous rolling followed by different annealing temperature, the HDI strengthening and contribution of texture evolution on plasticity have been investigated. The yield strength of the specimens without annealing treatment (AR) is measured to be as high as 1123 MPa, with an improvement of over 200 % compared to high-Mn austenitic steels prepared by conventional hot rolling process, and it gradually decreases with the increase in annealing temperature. Unexpectedly, the total elongation of the AR specimen reaches 28.4 %.

The enhanced yield strength of the AR specimen can be due to the dislocation strengthening and strengthening induced by grain refinement. The density of initial dislocations would be reduced, and grains would gradually coarse during the annealing heat treatment, as a result, the YS and UTS gradually decrease with the increase in annealing temperature. While it is the coupling effect of the enhanced deformation twining in those <100>//RD oriented grains and continuous plastic deformation capacity enhanced by the alternating distribution of Schmidt factor that contribute greatly to the TEL of the AR specimen.

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来源期刊

Materials Science and Engineering: A 工程技术-材料科学：综合

CiteScore

11.50

自引率

15.60%

发文量

1811

审稿时长

31 days

期刊介绍： Materials Science and Engineering A provides an international medium for the publication of theoretical and experimental studies related to the load-bearing capacity of materials as influenced by their basic properties, processing history, microstructure and operating environment. Appropriate submissions to Materials Science and Engineering A should include scientific and/or engineering factors which affect the microstructure - strength relationships of materials and report the changes to mechanical behavior.